/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *    \__\_\\__,_|\___||___/\__|____/|____/
 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2024 QuestDB
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

package io.questdb.griffin.engine.functions.regex;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.PlanSink;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.BooleanFunction;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.std.Chars;
import io.questdb.std.IntList;
import io.questdb.std.ObjList;

public class NotMatchCharFunctionFactory implements FunctionFactory {
    @Override
    public String getSignature() {
        return "!~(Sa)";
    }

    @Override
    public Function newInstance(int position, ObjList<Function> args, IntList argPositions, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) {
        return new MatchFunction(
                args.getQuick(0),
                args.getQuick(1).getChar(null)
        );
    }

    private static class MatchFunction extends BooleanFunction implements UnaryFunction {
        private final char expected;
        private final Function value;

        public MatchFunction(Function value, char expected) {
            this.value = value;
            this.expected = expected;
        }

        @Override
        public Function getArg() {
            return value;
        }

        @Override
        public boolean getBool(Record rec) {
            CharSequence cs = getArg().getStrA(rec);
            return cs != null && Chars.indexOf(cs, expected) == -1;
        }

        @Override
        public void toPlan(PlanSink sink) {
            sink.val(value).val(" !~ '").val(expected).val('\'');
        }
    }
}
